Variably proportional mixing device

Abstract

A variably proportional mixing device is provided for automatically mixing two fluids stored in separate containers in various ratios without measuring, comprising a self-venting spout that attaches to an existing gas can or other container for storing a fluid having a threaded opening therein. The spout doses gas with oil at the specific ratio required by an engine manufacturer and is easily adjusted to accommodate a plurality of other ratios. To accomplish this, a constant volume of gasoline is dosed with an amount of oil that is adjusted by the user. This adjustment mechanism comprises a wheel valve having various-sized orifices. Twisting the valve using a knob or key then provides the correct volumetric area for the oil to flow through. Markings will be visible on the valve, through a window, that correspond to a plurality of different ratios, typically ranging from 16:1 to 50:1. The dosing valve can also be shut-off completely to allow pure gasoline through the spout, such as for 4 cycle engines. A spring-loaded button or trigger mechanism is incorporated to allow for a positive closure when not in use. Static mixing elements are added at the end of the spout to ensure a thorough mixture of oil and gas.

1. A device for automatically mixing a first and a second fluid in one of an operator selectable ratios, the first fluid being stored in a first container, the second fluid being stored in a second container, said device comprising:
 a main body housing further comprising a manually operated fluid flow regulator for said second fluid, a mixing chamber and an output nozzle; 
 said mixing chamber receiving a first fluid input from a first fluid conduit providing fluid communication between said first container and said mixing chamber; 
 said mixing chamber receiving a second fluid input from a second fluid conduit providing fluid communication between a regulator output port of said regulator and said mixing chamber; 
 said fluid inputs gated by a single valve for opening and closing said fluid communication simultaneously between said conduits and said mixing chamber; 
 said mixing chamber having an output port in fluid communication with said output nozzle; 
 said regulator further having an input port in fluid communication with said second container; and 
 said fluids propelled solely by the force of gravity; 
 whereby upon the opening of said single valve said fluids flow from each respective container to the mixing chamber, said manual regulator controlling the flow of the second fluid in a predetermined manner so that the resultant mixture in the mixing chamber is in accordance with an operator selected ratio, and such predetermined ratio of fluids exits said device through said nozzle. 
 
     
     
       2. The device of  claim 1 , in which the single valve comprises a flapper valve. 
     
     
       3. The device of  claim 2 , in which said main housing further comprises a single fluid coupling port for receiving said first and second fluids simultaneous from said respective first and second containers;
 said port having a first orifice for fluidly coupling exclusively with said first container and having a second orifice for fluidly coupling exclusively with said second container; and 
 said second container being wholly enclosed inside of said first container. 
 
     
     
       4. The device of  claim 3 , further comprising
 a ratio adjustment selector mounted on an external surface of said main body; and 
 said selector is mechanically coupled to said fluid regulator. 
 
     
     
       5. The device of  claim 4 , wherein said regulator includes a plurality of orifices selectable by rotating said regulator using said ratio adjustment selector. 
     
     
       6. The device of  claim 5 , wherein said regulator is housed within a water-tight regulator housing. 
     
     
       7. The device of  claim 6 , further including an operator shutoff button mechanically connected to said valve and further biased by a spring in said valve closed position;
 whereby said first and second fluids are prevented from escaping from said device when said shutoff button is manually released. 
 
     
     
       8. The device of  claim 7 , wherein said ratio cylinder includes venting means. 
     
     
       9. The device of  claim 8 , further including at least one venting tube. 
     
     
       10. The device of  claim 9 , further comprising at least one static mixer disposed within said nozzle.